Power bank



FIG. 1 is a front perspective view of a power bank, showing my new design;

FIG. 2 is a front view of a power bank, showing my new design;

FIG. 3 is a rear view of a power bank, showing my new design;

FIG. 4 is a left side view of a power bank, showing my new design;

FIG. 5 is a right side view of a power bank, showing my new design;

FIG. 6 is a top view of a power bank, showing my new design; and,

FIG. 7 is a bottom view of a power bank, showing my new design. 

CLAIM The ornamental design for an power bank, as shown and described. 